ᐅ Strong sunlight causes discoloration on Kallax shelving units – any experiences?

Created on: 29 May 2020 08:37
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hermannpar
Hello everyone,

I have a Kallax shelf from Ikea in my apartment, positioned right next to a window that receives a lot of sunlight from morning until afternoon. I’ve noticed that the surface of the shelf in those areas gradually discolors over time, appearing significantly lighter than the rest – typical of UV-related fading.

My question for you is: Have you experienced similar effects of strong sunlight on Kallax shelves? How does it show on your furniture, and what steps have you taken to prevent or fix these discolorations? Are special UV-protection films or wood care products effective?

I would really appreciate it if you could share your experiences, as I don’t want to just wait until the shelf looks completely worn out. Thanks in advance for your feedback!
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danial60
30 May 2020 08:58
There are still some aspects to consider before making any alterations:

The Kallax surface is melamine-coated, which makes it waterproof but does not allow for maintenance like real wood. Sanding will hardly improve the condition because you would have to remove the melamine coating – something that is hardly possible without damaging the texture.

UV radiation causes a chemical change in the plastic film, leading to fading. This process cannot simply be reversed. Replacing the shelf is the last option in case of severe discoloration.

In this context, I also wonder whether the sunlight mainly comes through the window depending on orientation (south/east), and how long the piece of furniture is exposed to direct sunlight. This plays a major role in the intensity of the discoloration.
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hermannpar
30 May 2020 12:20
danial60 schrieb:
I’m also wondering if the sunlight mainly comes through the window due to its orientation in your case

Good question! My window faces south, so the sun shines on the shelf almost all day, especially in the morning and early afternoon. There are no trees or other shading in front of it.

This probably means the UV intensity is quite high. Maybe that explains the strong discoloration.

Does anyone have suggestions for transparent UV-permeable films that still offer some protection? Sounds contradictory, I know 🙂
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miAlessio
30 May 2020 14:33
@hermannpar

Transparent UV protection films often use a special type of plastic that filters out UV-A and UV-B radiation while allowing up to 90% of visible light to pass through. High-quality versions are nearly invisible when applied correctly and do not tend to yellow over time.

What to consider:
- UV protection rate: At least 95% UV filtering
- Light transmittance: 70-90% (the higher, the more light passes through)
- Durability: Prefer films with warranty and simulation test certifications

These films may cost a bit more but provide long-term protection and have minimal impact on the indoor climate.

Alternatively, special sun protection curtains also offer good protection, but through a different method.
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PULAU
31 May 2020 07:48
In addition to my previous comments, I would like to add: Another option could be to treat the furniture with UV-resistant furniture waxes or surface sealants. However, these products are often unsuitable for melamine surfaces, as they do not properly absorb or adhere.

If someone is interested in such a treatment, I recommend testing it on a small, inconspicuous area first.

Important: In my opinion, the window film is the best and most sustainable method.
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rickey
31 May 2020 10:05
danial60 schrieb:
The Kallax surface is melamine-coated, which makes it waterproof on one hand, but on the other hand does not allow for maintenance like with real wood.

Thank you for the technical explanation! I suspected that too but didn’t exactly know why nothing could be done. That makes the issue more understandable for me.

I also always appreciate when someone openly shares their uncertainties. I feel the same when I’m stuck on these kinds of topics.

What’s important is that we maintain a respectful exchange here :-)
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Mufato
1 Jun 2020 09:43
If I were you, I would simply turn the shelf away and apply the window film. This way, you can avoid the problem quickly and easily.